STC-105 Telephone Line Manager

This module checks the standard telephone line for correct voltage and current. The output is activated if voltage and/or current are out of specification or not present. One set of outputs is a DPDT form "C" relay. The other output is an optical isolator which may be configured for either N.O. or N.C. output functions. Direct switching to backup line can be accomplished with the on-board relay.

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Price - $43.00